Authors: Xijun Chang Yuman Wang Ran Zhao
Publish Date: 2003/08/12
Volume: 377, Issue: 4, Pages: 757-762
Abstract
Polyacrylpaminobenzenesulfonamideamidinepaminobenzenesulfonylamide chelating fiber containing S N and O elements was synthesized from polyacrylonitrile fiber and paminobenzene sulfonamide and used to enrich and separate trace BiIII HgIII AuIII and PdIV ions from wastewater and ore sample solution The enrichment acidity flow rate elution conditions reuse interference ions saturated adsorption capacity constant of adsorption rate analytical accuracy and actual samples on chelating fiber were investigated by means of inductively coupled plasma optical emission spectrometry ICPOES with satisfactory results Solutions of 100 ng mL−1 of BiIII HgIII AuIII and PdIV ions can be enriched quantitatively by this chelating fiber at a rate of 10 mL min−1 at pH 4 and desorbed quantitatively with 20 mL of 025 M HCl and 2 CSNH22 solution at 50 °C with recovery ≥97 When the chelating fiber was reused for 20 times the recoveries of the analyzed ions enriched by the fiber were still over 95 except for HgIII One thousandfold excesses of Mn2+ Ca2+ Zn2+ Mg2+ Fe3+ Cu2+ Ni2+ Al3+ and Ba2+ ions and thousandsfold excesses of Na+ and K+ cause little interference in the preconcentration and determination of the analyzed ions The saturated adsorption capacity of BiIII HgIII AuIII and PdIV was 4850×10−4 3235×10−4 2807×10−4 and 3386×10−4 mol g−1 respectively The constants of adsorption rate were 0409 min−1 for Bi 0122 min−1 for Hg 0039 min−1 for Au and 0080 min−1 for Pd The relative standard deviations RSDs for the enrichment and determination of 10 ng mL−1 BiIII HgIII AuIII and PdIV were lower than 23 The results obtained for these ions in actual samples by this method were basically in agreement with the given values with average errors of less than 10 FTIR spectra shows that the existence of –SO2–Ar –H2N–Ar O=C–NH– HN=C–NH– and –HN–SO2 functional groups are verified in the chelating fiber From the FTIR spectroscopy we can see that HgIII AuIII and PdIV are mainly combined with nitrogen and sulfur or oxygen and BiIII is mainly combined with nitrogen or oxygen of the groups to form a chelating complex
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